<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        let age = 22;

        console.log(typeof age); // number

        // 1. number 转化为 字符串
        age = age.toString();
        console.log(typeof age); // string

        // 2. 强制转化
        let score = String(100);
        console.log(typeof score);  // string

        // 3. prompt() 接收的数据作为字符串
        let temp = prompt('请输入一句话');
        console.log(typeof temp); // string
    </script>
</body>

</html>
let age = 22;

console.log(typeof age); number

. number 转化为 字符串
age = age.toString();
console.log(typeof age);  string

2. 强制转化
let score = String(100);
console.log(typeof score);   string

 3. prompt() 接收的数据作为字符串
let temp = prompt('请输入一句话');
console.log(typeof temp);  string


let age = 22;

console.log(typeof age);  number

 1. number 转化为 字符串
age = age.toString();
console.log(typeof age);  string

 2. 强制转化
let score = String(100);
console.log(typeof score);   string

 3. prompt() 接收的数据作为字符串
let temp = prompt('请输入一句话');
console.log(typeof temp); string